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Engine Mechanical – V6 Page 6A1–45
Step Action Yes No 10 Inspect for missing, loose or incorrect fasteners. Did you find any missing, loose or incorrect fasteners? Go to Step 11 Go to Step 12 11 Tighten any loose fasteners to the torque specification as provided in provided in 6. Torque Wrench Specifications. Replace any incorrect or missing fasteners. Did you complete the repairs? Go to Step 15 — 12 Inspect for a bent pulley. Did you find any bent pulleys? Go to Step 13 Go to Step 14 13 Replace bent pulleys as required. Did you complete the repair? Go to Step 15 — 14 Replace the accessory drive belt, refer to 3.5 Accessory Drive Belt. Did you complete the repair? Go to Step 15 — 15 Reinstall the accessory drive belt and operate the system to confirm the repair. Did you correct the chirp noise? Accessory drive system OK Go to 2.2 Symptoms, and restart the diagnosis Drive Belt Squeal Definition Accessory drive belt squealing can be defined as a loud screeching noise caused by a slipping drive belt. Belt squeal is Diagnostic Aids If the noise is intermittent, confirm the accessory drive components by varying their loads, making sure they are operated A loose or incorrectly installed body component, suspension component or other item may be the cause of the noise. Test Description The numbers below refer to steps in the diagnostic table. 2 The noise may not be engine related. This step is to confirm the engine is making the noise. If the engine is not 3 The noise may be an internal engine noise. Removing the drive belt and operating the engine briefly will confirm CAUTION
When running the engine with the accessory N O T E There may also be a number of DTCs set when 4 Confirms an accessory drive component does not have a seized bearing. With the belt removed, test the bearings 5 Confirms the drive belt tensioner is operating correctly. If the drive belt tensioner is not operating correctly, drive 6 Confirms the belt is not too long, which would prevent the tensioner from working as intended. Also, if an |